user_manager component: Add UserManagerBase class.

chrome/browser/chromeos/login/users/chrome_user_manager.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_CHROMEOS_LOGIN_USERS_USER_MANAGER_IMPL_H_
-#define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_USER_MANAGER_IMPL_H_
+#ifndef CHROME_BROWSER_CHROMEOS_LOGIN_USERS_CHROME_USER_MANAGER_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_CHROME_USER_MANAGER_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/synchronization/lock.h"
 #include "base/time/time.h"
 #include "chrome/browser/chromeos/login/users/avatar/user_image_manager_impl.h"
 #include "chrome/browser/chromeos/login/users/multi_profile_user_controller_delegate.h"
-#include "chrome/browser/chromeos/login/users/user_manager.h"
+#include "chrome/browser/chromeos/login/users/user_manager_base.h"
 #include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
 #include "chrome/browser/chromeos/policy/cloud_external_data_policy_observer.h"
 #include "chrome/browser/chromeos/policy/device_local_account_policy_service.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
 #include "components/user_manager/user.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class PrefService;
 class ProfileSyncService;
 
 namespace policy {
 struct DeviceLocalAccount;
 }
 
 namespace chromeos {
 
 class MultiProfileUserController;
 class RemoveUserDelegate;
 class SupervisedUserManagerImpl;
 class SessionLengthLimiter;
 
-// Implementation of the UserManager.
-class UserManagerImpl
-    : public UserManager,
+// Chrome specific implementation of the UserManager.
+class ChromeUserManager
+    : public UserManagerBase,
       public content::NotificationObserver,
       public policy::CloudExternalDataPolicyObserver::Delegate,
       public policy::DeviceLocalAccountPolicyService::Observer,
       public MultiProfileUserControllerDelegate {
  public:
-  virtual ~UserManagerImpl();
+  virtual ~ChromeUserManager();
 
   // UserManager implementation:
   virtual void Shutdown() OVERRIDE;
   virtual MultiProfileUserController* GetMultiProfileUserController() OVERRIDE;
   virtual UserImageManager* GetUserImageManager(
       const std::string& user_id) OVERRIDE;
   virtual SupervisedUserManager* GetSupervisedUserManager() OVERRIDE;
-  virtual const user_manager::UserList& GetUsers() const OVERRIDE;
   virtual user_manager::UserList GetUsersAdmittedForMultiProfile()
       const OVERRIDE;
-  virtual const user_manager::UserList& GetLoggedInUsers() const OVERRIDE;
-  virtual const user_manager::UserList& GetLRULoggedInUsers() OVERRIDE;
   virtual user_manager::UserList GetUnlockUsers() const OVERRIDE;
-  virtual const std::string& GetOwnerEmail() OVERRIDE;
-  virtual void UserLoggedIn(const std::string& user_id,
-                            const std::string& user_id_hash,
-                            bool browser_restart) OVERRIDE;
-  virtual void SwitchActiveUser(const std::string& user_id) OVERRIDE;
   virtual void SessionStarted() OVERRIDE;
-  virtual void RemoveUser(const std::string& user_id,
-                          RemoveUserDelegate* delegate) OVERRIDE;
-  virtual void RemoveUserFromList(const std::string& user_id) OVERRIDE;
-  virtual bool IsKnownUser(const std::string& user_id) const OVERRIDE;
-  virtual const user_manager::User* FindUser(
-      const std::string& user_id) const OVERRIDE;
-  virtual user_manager::User* FindUserAndModify(
-      const std::string& user_id) OVERRIDE;
-  virtual const user_manager::User* GetLoggedInUser() const OVERRIDE;
-  virtual user_manager::User* GetLoggedInUser() OVERRIDE;
-  virtual const user_manager::User* GetActiveUser() const OVERRIDE;
-  virtual user_manager::User* GetActiveUser() OVERRIDE;
-  virtual const user_manager::User* GetPrimaryUser() const OVERRIDE;
   virtual void SaveUserOAuthStatus(
       const std::string& user_id,
       user_manager::User::OAuthTokenStatus oauth_token_status) OVERRIDE;
-  virtual void SaveForceOnlineSignin(const std::string& user_id,
-                                     bool force_online_signin) OVERRIDE;
   virtual void SaveUserDisplayName(const std::string& user_id,
                                    const base::string16& display_name) OVERRIDE;
-  virtual base::string16 GetUserDisplayName(
-      const std::string& user_id) const OVERRIDE;
-  virtual void SaveUserDisplayEmail(const std::string& user_id,
-                                    const std::string& display_email) OVERRIDE;
-  virtual std::string GetUserDisplayEmail(
-      const std::string& user_id) const OVERRIDE;
-  virtual void UpdateUserAccountData(
-      const std::string& user_id,
-      const UserAccountData& account_data) OVERRIDE;
-  virtual bool IsCurrentUserOwner() const OVERRIDE;
-  virtual bool IsCurrentUserNew() const OVERRIDE;
-  virtual bool IsCurrentUserNonCryptohomeDataEphemeral() const OVERRIDE;
   virtual bool CanCurrentUserLock() const OVERRIDE;
-  virtual bool IsUserLoggedIn() const OVERRIDE;
-  virtual bool IsLoggedInAsRegularUser() const OVERRIDE;
-  virtual bool IsLoggedInAsDemoUser() const OVERRIDE;
-  virtual bool IsLoggedInAsPublicAccount() const OVERRIDE;
-  virtual bool IsLoggedInAsGuest() const OVERRIDE;
-  virtual bool IsLoggedInAsSupervisedUser() const OVERRIDE;
-  virtual bool IsLoggedInAsKioskApp() const OVERRIDE;
-  virtual bool IsLoggedInAsStub() const OVERRIDE;
-  virtual bool IsSessionStarted() const OVERRIDE;
   virtual bool IsUserNonCryptohomeDataEphemeral(
       const std::string& user_id) const OVERRIDE;
-  virtual void AddObserver(UserManager::Observer* obs) OVERRIDE;
-  virtual void RemoveObserver(UserManager::Observer* obs) OVERRIDE;
-  virtual void AddSessionStateObserver(
-      UserManager::UserSessionStateObserver* obs) OVERRIDE;
-  virtual void RemoveSessionStateObserver(
-      UserManager::UserSessionStateObserver* obs) OVERRIDE;
-  virtual void NotifyLocalStateChanged() OVERRIDE;
 
   virtual UserFlow* GetCurrentUserFlow() const OVERRIDE;
   virtual UserFlow* GetUserFlow(const std::string& user_id) const OVERRIDE;
   virtual void SetUserFlow(const std::string& user_id, UserFlow* flow) OVERRIDE;
   virtual void ResetUserFlow(const std::string& user_id) OVERRIDE;
   virtual bool AreSupervisedUsersAllowed() const OVERRIDE;
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // policy::CloudExternalDataPolicyObserver::Delegate:
   virtual void OnExternalDataSet(const std::string& policy,
                                  const std::string& user_id) OVERRIDE;
   virtual void OnExternalDataCleared(const std::string& policy,
                                      const std::string& user_id) OVERRIDE;
   virtual void OnExternalDataFetched(const std::string& policy,
                                      const std::string& user_id,
                                      scoped_ptr<std::string> data) OVERRIDE;
 
   // policy::DeviceLocalAccountPolicyService::Observer implementation.
   virtual void OnPolicyUpdated(const std::string& user_id) OVERRIDE;
   virtual void OnDeviceLocalAccountsChanged() OVERRIDE;
 
   void StopPolicyObserverForTesting();
 
+ protected:
+  // UserManagerBase implementation:
+  virtual bool AreEphemeralUsersEnabled() const OVERRIDE;
+  virtual const std::string& GetApplicationLocale() const OVERRIDE;
+  virtual PrefService* GetLocalState() const OVERRIDE;
+  virtual bool IsEnterpriseManaged() const OVERRIDE;
+  virtual void LoadPublicAccounts(std::set<std::string>* users_set) OVERRIDE;
+  virtual void NotifyOnLogin() OVERRIDE;
+  virtual void NotifyUserAddedToSession(const user_manager::User* added_user,
+                                        bool user_switch_pending) OVERRIDE;
+  virtual void PerformPreUserListLoadingActions() OVERRIDE;
+  virtual void PerformPostUserListLoadingActions() OVERRIDE;
+  virtual void PerformPostUserLoggedInActions(bool browser_restart) OVERRIDE;
+  virtual void RemoveNonCryptohomeData(const std::string& user_id) OVERRIDE;
+  virtual void RemoveUserInternal(const std::string& user_email,
+                                  RemoveUserDelegate* delegate) OVERRIDE;
+  virtual bool IsDemoApp(const std::string& user_id) const OVERRIDE;
+  virtual bool IsKioskApp(const std::string& user_id) const OVERRIDE;
+  virtual bool IsPublicAccountMarkedForRemoval(
+      const std::string& user_id) const OVERRIDE;
+  virtual void DemoAccountLoggedIn() OVERRIDE;
+  virtual void GuestUserLoggedIn() OVERRIDE;
+  virtual void KioskAppLoggedIn(const std::string& app_id) OVERRIDE;
+  virtual void PublicAccountUserLoggedIn(user_manager::User* user) OVERRIDE;
+  virtual void RegularUserLoggedIn(const std::string& user_id) OVERRIDE;
+  virtual void RegularUserLoggedInAsEphemeral(
+      const std::string& user_id) OVERRIDE;
+  virtual void RetailModeUserLoggedIn() OVERRIDE;
+  virtual void SupervisedUserLoggedIn(const std::string& user_id) OVERRIDE;
+
  private:
   friend class SupervisedUserManagerImpl;
   friend class UserManager;
+  friend class UserManagerTest;
   friend class WallpaperManager;
-  friend class UserManagerTest;
   friend class WallpaperManagerTest;
 
-  typedef base::hash_map<std::string,
-      linked_ptr<UserImageManager> > UserImageManagerMap;
+  typedef base::hash_map<std::string, linked_ptr<UserImageManager> >
+      UserImageManagerMap;
 
-  // Stages of loading user list from preferences. Some methods can have
-  // different behavior depending on stage.
-  enum UserLoadStage {
-    STAGE_NOT_LOADED = 0,
-    STAGE_LOADING,
-    STAGE_LOADED
-  };
-
-  UserManagerImpl();
-
-  // Loads |users_| from Local State if the list has not been loaded yet.
-  // Subsequent calls have no effect. Must be called on the UI thread.
-  void EnsureUsersLoaded();
+  ChromeUserManager();
 
   // Retrieves trusted device policies and removes users from the persistent
   // list if ephemeral users are enabled. Schedules a callback to itself if
   // trusted device policies are not yet available.
   void RetrieveTrustedDevicePolicies();
 
-  // Returns true if trusted device policies have successfully been retrieved
-  // and ephemeral users are enabled.
-  bool AreEphemeralUsersEnabled() const;
-
-  // Returns a list of users who have logged into this device previously.
-  // Same as GetUsers but used if you need to modify User from that list.
-  user_manager::UserList& GetUsersAndModify();
-
-  // Returns the user with the given email address if found in the persistent
-  // list. Returns |NULL| otherwise.
-  const user_manager::User* FindUserInList(const std::string& user_id) const;
-
-  // Returns |true| if user with the given id is found in the persistent list.
-  // Returns |false| otherwise. Does not trigger user loading.
-  const bool UserExistsInList(const std::string& user_id) const;
-
-  // Same as FindUserInList but returns non-const pointer to User object.
-  user_manager::User* FindUserInListAndModify(const std::string& user_id);
-
-  // Indicates that a user just logged in as guest.
-  void GuestUserLoggedIn();
-
-  // Indicates that a regular user just logged in.
-  void RegularUserLoggedIn(const std::string& user_id);
-
-  // Indicates that a regular user just logged in as ephemeral.
-  void RegularUserLoggedInAsEphemeral(const std::string& user_id);
-
-  // Indicates that a supervised user just logged in.
-  void SupervisedUserLoggedIn(const std::string& user_id);
-
-  // Indicates that a user just logged into a public session.
-  void PublicAccountUserLoggedIn(user_manager::User* user);
-
-  // Indicates that a kiosk app robot just logged in.
-  void KioskAppLoggedIn(const std::string& app_id);
-
-  // Indicates that the demo account has just logged in.
-  void DemoAccountLoggedIn();
-
-  // Indicates that a user just logged into a retail mode session.
-  void RetailModeUserLoggedIn();
-
-  // Notifies that user has logged in.
-  // Sends NOTIFICATION_LOGIN_USER_CHANGED notification.
-  void NotifyOnLogin();
-
-  // Reads user's oauth token status from local state preferences.
-  user_manager::User::OAuthTokenStatus LoadUserOAuthStatus(
-      const std::string& user_id) const;
-
-  // Read a flag indicating whether online authentication against GAIA should
-  // be enforced during the user's next sign-in from local state preferences.
-  bool LoadForceOnlineSignin(const std::string& user_id) const;
-
-  void SetCurrentUserIsOwner(bool is_current_user_owner);
-
   // Updates current user ownership on UI thread.
   void UpdateOwnership();
 
-  // Removes data stored or cached outside the user's cryptohome (wallpaper,
-  // avatar, OAuth token status, display name, display email).
-  void RemoveNonCryptohomeData(const std::string& user_id);
-
-  // Removes a regular or supervised user from the user list.
-  // Returns the user if found or NULL otherwise.
-  // Also removes the user from the persistent user list.
-  user_manager::User* RemoveRegularOrSupervisedUserFromList(
-      const std::string& user_id);
-
   // If data for a public account is marked as pending removal and the user is
   // no longer logged into that account, removes the data.
   void CleanUpPublicAccountNonCryptohomeDataPendingRemoval();
 
   // Removes data belonging to public accounts that are no longer found on the
   // user list. If the user is currently logged into one of these accounts, the
   // data for that account is not removed immediately but marked as pending
   // removal after logout.
   void CleanUpPublicAccountNonCryptohomeData(
       const std::vector<std::string>& old_public_accounts);
 
   // Replaces the list of public accounts with those found in
   // |device_local_accounts|. Ensures that data belonging to accounts no longer
   // on the list is removed. Returns |true| if the list has changed.
   // Public accounts are defined by policy. This method is called whenever an
   // updated list of public accounts is received from policy.
   bool UpdateAndCleanUpPublicAccounts(
       const std::vector<policy::DeviceLocalAccount>& device_local_accounts);
 
   // Updates the display name for public account |username| from policy settings
   // associated with that username.
   void UpdatePublicAccountDisplayName(const std::string& user_id);
 
   // Notifies the UI about a change to the user list.
   void NotifyUserListChanged();
 
-  // Notifies observers that merge session state had changed.
-  void NotifyMergeSessionStateChanged();
-
-  // Notifies observers that active user has changed.
-  void NotifyActiveUserChanged(const user_manager::User* active_user);
-
-  // Notifies observers that another user was added to the session.
-  void NotifyUserAddedToSession(const user_manager::User* added_user);
-
-  // Notifies observers that active user_id hash has changed.
-  void NotifyActiveUserHashChanged(const std::string& hash);
-
   // Lazily creates default user flow.
   UserFlow* GetDefaultUserFlow() const;
 
-  // Update the global LoginState.
-  void UpdateLoginState();
-
-  // Insert |user| at the front of the LRU user list.
-  void SetLRUUser(user_manager::User* user);
-
-  // Adds |user| to users list, and adds it to front of LRU list. It is assumed
-  // that there is no user with same id.
-  void AddUserRecord(user_manager::User* user);
-
-  // Sends metrics in response to a regular user logging in.
-  void SendRegularUserLoginMetrics(const std::string& user_id);
-
-  // Implementation for RemoveUser method. This is an asynchronous part of the
-  // method, that verifies that owner will not get deleted, and calls
-  // |RemoveNonOwnerUserInternal|.
-  void RemoveUserInternal(const std::string& user_email,
-                          RemoveUserDelegate* delegate);
-
-  // Implementation for RemoveUser method. It is synchronous. It is called from
-  // RemoveUserInternal after owner check.
-  void RemoveNonOwnerUserInternal(const std::string& user_email,
-                                  RemoveUserDelegate* delegate);
-
   // MultiProfileUserControllerDelegate implementation:
   virtual void OnUserNotAllowed(const std::string& user_email) OVERRIDE;
 
-  // Sets account locale for user with id |user_id|.
-  virtual void UpdateUserAccountLocale(const std::string& user_id,
-                                       const std::string& locale);
-
-  // Updates user account after locale was resolved.
-  void DoUpdateAccountLocale(const std::string& user_id,
-                             const std::string& resolved_locale);
-
   // Update the number of users.
   void UpdateNumberOfUsers();
 
-  // A wrapper around C++ delete operator. Deletes |user|, and when |user|
-  // equals to active_user_, active_user_ is reset to NULL.
-  void DeleteUser(user_manager::User* user);
-
   // Interface to the signed settings store.
   CrosSettings* cros_settings_;
 
   // Interface to device-local account definitions and associated policy.
   policy::DeviceLocalAccountPolicyService* device_local_account_policy_service_;
 
-  // Indicates stage of loading user from prefs.
-  UserLoadStage user_loading_stage_;
-
-  // List of all known users. User instances are owned by |this|. Regular users
-  // are removed by |RemoveUserFromList|, public accounts by
-  // |UpdateAndCleanUpPublicAccounts|.
-  user_manager::UserList users_;
-
-  // List of all users that are logged in current session. These point to User
-  // instances in |users_|. Only one of them could be marked as active.
-  user_manager::UserList logged_in_users_;
-
-  // A list of all users that are logged in the current session. In contrast to
-  // |logged_in_users|, the order of this list is least recently used so that
-  // the active user should always be the first one in the list.
-  user_manager::UserList lru_logged_in_users_;
-
-  // The list which gets reported when the |lru_logged_in_users_| list is empty.
-  user_manager::UserList temp_single_logged_in_users_;
-
-  // The logged-in user that is currently active in current session.
-  // NULL until a user has logged in, then points to one
-  // of the User instances in |users_|, the |guest_user_| instance or an
-  // ephemeral user instance.
-  user_manager::User* active_user_;
-
-  // The primary user of the current session. It is recorded for the first
-  // signed-in user and does not change thereafter.
-  user_manager::User* primary_user_;
-
-  // True if SessionStarted() has been called.
-  bool session_started_;
-
-  // Cached flag of whether currently logged-in user is owner or not.
-  // May be accessed on different threads, requires locking.
-  bool is_current_user_owner_;
-  mutable base::Lock is_current_user_owner_lock_;
-
-  // Cached flag of whether the currently logged-in user existed before this
-  // login.
-  bool is_current_user_new_;
-
-  // Cached flag of whether the currently logged-in user is a regular user who
-  // logged in as ephemeral. Storage of persistent information is avoided for
-  // such users by not adding them to the persistent user list, not downloading
-  // their custom avatars and mounting their cryptohomes using tmpfs. Defaults
-  // to |false|.
-  bool is_current_user_ephemeral_regular_user_;
-
-  // Cached flag indicating whether the ephemeral user policy is enabled.
-  // Defaults to |false| if the value has not been read from trusted device
-  // policy yet.
-  bool ephemeral_users_enabled_;
-
-  // Cached name of device owner. Defaults to empty string if the value has not
-  // been read from trusted device policy yet.
-  std::string owner_email_;
-
   content::NotificationRegistrar registrar_;
 
-  ObserverList<UserManager::Observer> observer_list_;
-
-  // TODO(nkostylev): Merge with session state refactoring CL.
-  ObserverList<UserManager::UserSessionStateObserver>
-      session_state_observer_list_;
-
   // User avatar managers.
   UserImageManagerMap user_image_managers_;
 
   // Supervised user manager.
   scoped_ptr<SupervisedUserManagerImpl> supervised_user_manager_;
 
   // Session length limiter.
   scoped_ptr<SessionLengthLimiter> session_length_limiter_;
 
   typedef std::map<std::string, UserFlow*> FlowMap;
 
   // Lazy-initialized default flow.
   mutable scoped_ptr<UserFlow> default_flow_;
 
   // Specific flows by user e-mail. Keys should be canonicalized before
   // access.
   FlowMap specific_flows_;
 
-  // Time at which this object was created.
-  base::TimeTicks manager_creation_time_;
-
-  scoped_ptr<CrosSettings::ObserverSubscription>
-      local_accounts_subscription_;
+  scoped_ptr<CrosSettings::ObserverSubscription> local_accounts_subscription_;
 
   scoped_ptr<MultiProfileUserController> multi_profile_user_controller_;
 
   // Observer for the policy that can be used to manage user images.
   scoped_ptr<policy::CloudExternalDataPolicyObserver> avatar_policy_observer_;
 
   // Observer for the policy that can be used to manage wallpapers.
   scoped_ptr<policy::CloudExternalDataPolicyObserver>
       wallpaper_policy_observer_;
 
-  // ID of the user just added to the session that needs to be activated
-  // as soon as user's profile is loaded.
-  std::string pending_user_switch_;
+  base::WeakPtrFactory<ChromeUserManager> weak_factory_;
 
-  DISALLOW_COPY_AND_ASSIGN(UserManagerImpl);
+  DISALLOW_COPY_AND_ASSIGN(ChromeUserManager);
 };
 
 }  // namespace chromeos
 
-#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_USER_MANAGER_IMPL_H_
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_CHROME_USER_MANAGER_H_